stealc | 3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d

General

Target

3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe
Size

2.4MB
MD5

168e5678ee6435390c3cbe2c60535464
SHA1

9f652f16cee90406e1adcceb9afe1c19a7267f9b
SHA256

3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d
SHA512

291f54d1262e910578db90670a512bb5018525271949ba5d28ec80506d9bf803fb36682e46df0abd9c7f03dbf64d52be548f776e1316fa5323b1f39d2d4ebc00
SSDEEP

49152:jxIRJF1HL+VdX68kUiJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68ditIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/4988-3-0x00000000040F0000-0x0000000004239000-memory.dmp	family_vidar_v7
behavioral2/memory/3368-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3368-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3368-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3368-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3368-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3368-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3368-38-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

kat4873.tmp

pid process

3368 kat4873.tmp
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

pid	process
3368	kat4873.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe

description	pid	process	target process
PID 4988 set thread context of 3368	4988	3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe	kat4873.tmp

Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

kat4873.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4873.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4873.tmp

pid process

3368 kat4873.tmp
3368 kat4873.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4873.tmp

pid	process
3368	kat4873.tmp
3368	kat4873.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe

description	pid	process	target process
PID 4988 wrote to memory of 3368	4988	3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe	kat4873.tmp
PID 4988 wrote to memory of 3368	4988	3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe	kat4873.tmp
PID 4988 wrote to memory of 3368	4988	3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe	kat4873.tmp
PID 4988 wrote to memory of 3368	4988	3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe	kat4873.tmp
PID 4988 wrote to memory of 3368	4988	3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe	kat4873.tmp
PID 4988 wrote to memory of 3368	4988	3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe	kat4873.tmp
PID 4988 wrote to memory of 3368	4988	3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe	kat4873.tmp
PID 4988 wrote to memory of 3368	4988	3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe	kat4873.tmp

C:\Users\Admin\AppData\Local\Temp\3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe
"C:\Users\Admin\AppData\Local\Temp\3de8b9b1d08028b686b6d6f60d71fa66b2ad895e8a1e05613ba22a57c337330d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4988

C:\Users\Admin\AppData\Local\Temp\kat4873.tmp
C:\Users\Admin\AppData\Local\Temp\kat4873.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3368

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat4873.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3368-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3368-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3368-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3368-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3368-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3368-23-0x0000000026040000-0x000000002629F000-memory.dmp

Filesize
2.4MB

Download
memory/3368-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3368-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4988-0-0x00000000024D0000-0x00000000024D1000-memory.dmp

Filesize
4KB

Download
memory/4988-3-0x00000000040F0000-0x0000000004239000-memory.dmp

Filesize
1.3MB

Download
memory/4988-10-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads